volunteer events will be held in all 50 states and the obamas and bidens will attend a service fair on the national mall featuring 100 volunteer organizations. nbc's special correspondent chelsea clinton is the honorary chair of that event. chelsea, nice to see you. good morning. >> nice to see you, matt. good morning. >> i know michelle obama said back in 2009 at the first inaugural, the national service day was her favorite part of the entire event. i also know she and her husband, and the bidens and you would like to grow that event. how do you go about doing it? >> oh, we're so excited. we have events in every state. we have more than 2,000 different events. there will be more than 50,000 volunteer opportunities for people to take advantage of. and on the mall alone, as you mentioned, there will be more than 100 organizations participating in seven different events in what we believe to be the largest service event ever taking place in our nation's capital. >> i was looking, the world giving index shows the united states among the top ten countries with the most generous citizens.